I have the Fisher F2. I have nothing to compare it to but before I purchased, I went on line and reviewed. There are several Utube videos on many product models.
I bought mine from Big Boy Hobbies as a combo pack. Detector, Headphones, and pin-pointer.
The detector itself is plug and play. Basically automatic. It has descriminator setting and filters but I have been using it wide open and just learning the tones.
Are there better ones? Yes definitely but for the price, I would recommend the F2.
I did upgrade to the XPointer because the pin pointer that came in the combo pack works ok but you have to be practically touching the target to set it off. The XPointer on the other hand detects my target like pin pointers should.
But for the money they want for the combo, they practically give you the pin pointer.
Whatever choice you make, good luck. There are treasures to by found and hours of enjoyment.